BD−17 63 b

BD-17°63 b / Finlay

Discovery[1]
Discovered by	Moutou et al.
Discovery site	La Silla Observatory
Discovery date	October 26, 2008
Detection method	Doppler spectroscopy (HARPS)
Designations
Alternative designations	Finlay
Orbital characteristics[2]
Semi-major axis	1.361±0.021 AU
Eccentricity	0.5455±0.0025
Orbital period (sidereal)	655.641+0.070 −0.076 d
Inclination	82.4°+2.8° −2.0°
Longitude of ascending node	127.0°+5.1° −3.6°
Time of periastron	2,457,249.6+0.36 −0.32 JD
Argument of periastron	112.41°±0.43°
Semi-amplitude	173.35+0.76 −0.69 m/s
Star	BD−17 63
Physical characteristics[2]
Mass	5.325±0.036 MJ

BD-17°63 b, formally named Finlay, is an exoplanet located approximately 112.5 light-years away in the constellation of Cetus, orbiting the 10th magnitude K-type main sequence star BD−17 63. This planet has a minimum mass of 5.1 M_J and orbits at a distance of 1.34 astronomical units from the star. The distance ranges from 0.62 AU to 2.06 AU, corresponding to the eccentricity of 0.54. One revolution takes about 656 days.^[1]

This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO’s 3.6 meter telescope installed at La Silla Observatory in Atacama Desert, Chile.

The planet BD-17 63 b is named Finlay. The name was selected in the NameExoWorlds campaign by Cuba, during the 100th anniversary of the IAU. Carlos Juan Finlay (1833–1915) was an epidemiologist recognized as a pioneer in the research of yellow fever.^[3][4]

An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3,^[5][6] with another astrometric orbital solution published in 2023.^[2]

See also

• HD 143361 b
• HD 145377 b
• HD 153950 b
• HD 20868 b
• HD 43848
• HD 48265 b
• HD 73267 b

References

1. Moutou, C.; et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics. 496 (2): 513–519. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. S2CID 116707055.
2. Unger, N.; Ségransan, D.; et al. (December 2023). "Exploring the brown dwarf desert with precision radial velocities and Gaia DR3 astrometric orbits". Astronomy & Astrophysics. 680: A16. arXiv:2310.02758. Bibcode:2023A&A...680A..16U. doi:10.1051/0004-6361/202347578.
3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
5. Gaia Collaboration; et al. (June 2023). "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics. 674: A34. arXiv:2206.05595. Bibcode:2023A&A...674A..34G. doi:10.1051/0004-6361/202243782.
6. Winn, Joshua N. (September 2022). "Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data". The Astronomical Journal. 164 (5): 196. arXiv:2209.05516. Bibcode:2022AJ....164..196W. doi:10.3847/1538-3881/ac9126. S2CID 252211643.

External links

• "BD-17 63 b". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-06.